Collapsible picnic table



FIG. 1 is a closed isometric view of a collapsible picnic table showing my new design;

FIG. 2 is a typical side view;

FIG. 3 is a rear view;

FIG. 4 is a bottom view; and

FIG. 5 is an open isometric view thereof. 

The ornamental design for a collapsible picnic table, substantially as shown and described. 